Using these candles is a breeze. First, make sure the on/off switch at the bottom of the candle is in the 'off' position. Then, insert the included CR2032 button cell battery into the battery compartment. Once the battery is in, flip the switch to 'on' and enjoy the warm white glow. Remember, these candles are not waterproof, so keep them away from water. When the batteries run out after about 50 hours of use, simply replace them with new CR2032 button cell batteries. To keep your candles looking their best, gently wipe them with a dry cloth if they get dusty.